Malicious PDF — malware analysis report

Static analysis result for SHA-256 470718e2071ccfcc…

MALICIOUS

PDF

79.0 KB Created: 2021-07-18 13:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fa8a75c7c6bf72e2223f303f1d636f8 SHA-1: 44de95f555e90b9d6f65891b42aa8003eb258fa9 SHA-256: 470718e2071ccfcce1250dac9821695a7bf1bf1fb484502550c8308c0902392f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised websites and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://osc-pribor.ru/products_pictures/file/14554026737.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16086eeb69bf6a---xijavezowenigatak.pdf
    • https://tortugafilms.ca/adminfiles/file/72372847471.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65e17036bd---88787366011.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe0dee0296---60052746622.pdf
    • http://trips-in.com/ckupload/files/betadorule.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/09a7f01882e92f8469df0be3721c11ae/97235796083.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db97722787---31186951737.pdf
    • http://www.ecostroyservis.ru/File/zawemovakabo.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609249953889d---zenaruligoledekugeji.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2439d04ce1---butivipabipawokenofen.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1fb081c8d---pomepovom.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/31094644284.pdf
    • http://assushop.com/userfiles/assushop.com/file/tizuduxekewizigofone.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d022800db03---ratokokiveto.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4d376b551---guwujezepumesudo.pdf
    • http://naphotelbangkok.com/userfiles/files/56228562677.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa0eea2c95---56997795490.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f45f36d79---retidejufalanawur.pdf
    • http://locthanhwindow.com/img_duhoc/files/46007337266.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/piravaninojok.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e29d3905bc0530ffb61208df5faef7c9/44397054066.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4a564d6300dbf3278170629a512ef310/23244255610.pdf
    • http://www.asslar.de/downloads/balodufum.pdf
    • http://classicalgardenornaments.com/uplds/file/fisame.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/s1oa7sefebbunomo9m7epef4ou/92851532507.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=skater+of+the+year+2020
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 16792 bytes
font_01_sfnt_off0000e9ea.bin
6d8b1ec53ca7c002f5ac34466ec146d85cc984bc3a76fee4c7b5c22698211c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 16880 bytes
font_02_sfnt_off00011544.bin
05835d0d16e004198d0f4db49003f7a896439a97bfb65ac2634ccf523dbc624f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 10424 bytes